^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) * arch/xtensa/kernel/mcount.S
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * Xtensa specific mcount support
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * This file is subject to the terms and conditions of the GNU General Public
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * License. See the file "COPYING" in the main directory of this archive
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) * for more details.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) * Copyright (C) 2013 Tensilica Inc.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/linkage.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <asm/asmmacro.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <asm/ftrace.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) * Entry condition:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) * a2: a0 of the caller
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) ENTRY(_mcount)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) abi_entry_default
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) movi a4, ftrace_trace_function
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) l32i a4, a4, 0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) movi a3, ftrace_stub
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) bne a3, a4, 1f
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) abi_ret_default
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) 1: xor a7, a2, a1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) movi a3, 0x3fffffff
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) and a7, a7, a3
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) xor a7, a7, a1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) xor a6, a0, a1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) and a6, a6, a3
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) xor a6, a6, a1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) addi a6, a6, -MCOUNT_INSN_SIZE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) callx4 a4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) abi_ret_default
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) ENDPROC(_mcount)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) ENTRY(ftrace_stub)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) abi_entry_default
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) abi_ret_default
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) ENDPROC(ftrace_stub)